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#! perl |
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|
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# this extension swaps out maps and resets them, in essence managing |
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# the reset/swap policy of the server. |
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# it also contains the map prefetching logic |
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|
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our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu |
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our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out |
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our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs |
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our $SAVE_TIMEOUT = 20; # save maps every n seconds |
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our $SAVE_INTERVAL = 0.1; # save at max. one map every $SAVE_INTERVAL |
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|
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cf::async_ext { |
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$Coro::current->prio (Coro::PRIO_MIN); |
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# load the header of swapped-out maps. |
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# this is not a correctness issue, it simply saves diskspace |
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# because old files will get cleaned up on reset time |
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Coro::Timer::sleep 1; |
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|
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my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; |
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|
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for my $map (@$files) { |
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utf8::decode $map; |
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next if $map =~ /\.(?:pst|meta)$/; |
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$map =~ s/∕/\//g; |
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cf::map::find $map; |
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Coro::Timer::sleep 0.05; |
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} |
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|
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#TODO: should also preload random maps... |
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}; |
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|
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our $SCHEDULER = cf::async_ext { |
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while () { |
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Coro::Timer::sleep $SCHEDULE_INTERVAL; |
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|
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# this weird form of iteration over values is used because |
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# the hash changes underneath us frequently, and for |
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# keeps a direct reference to the value without (in 5.8 perls) |
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# keeping a reference, so this is prone to crashes or worse. |
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my @maps = keys %cf::MAP; |
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for (@maps) { |
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my $map = $cf::MAP{$_} |
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or next; |
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$map->valid or next; |
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|
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eval { |
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# not yet, because maps might become visible to players nearby |
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# we need to remove the map from %cf::MAP and all tiled map links |
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# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { |
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# $map->deactivate; |
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# delete $map->{active}; |
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# } |
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if ($map->should_reset) { |
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$map->reset; |
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} elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
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if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { |
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$map->swap_out; |
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Coro::Timer::sleep $SAVE_INTERVAL; |
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} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
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$map->save; |
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Coro::Timer::sleep $SAVE_INTERVAL; |
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} |
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} |
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}; |
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warn $@ if $@; |
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Coro::cede; |
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}; |
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} |
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}; |
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|
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$SCHEDULER->prio (-2); |
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|
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# map load prefetch for tiled maps, possibly exits, too |
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cf::map->attach ( |
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on_enter => sub { |
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my ($map, $pl) = @_; |
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|
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(cf::async { |
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my @diag; # diagonal neighbours |
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|
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for (0 .. 3) { |
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my $neigh = $map->tile_path ($_) |
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or next; |
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$neigh = cf::map::find $neigh, $map |
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or next; |
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$neigh->load; |
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|
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push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh], |
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[$neigh->tile_path (($_ + 1) % 4), $neigh]; |
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} |
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|
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for (@diag) { |
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my $neigh = cf::map::find @$_ |
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or next; |
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$neigh->load; |
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} |
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})->prio (2); |
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# higher prio because prefetching is very important |
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# as it prefetches maps that can make the server block |
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}, |
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); |
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|
